Valve for bicycle-tires.



No. 629,56l. Patented -July 25, |899. T. HARRISON. VALVE FUR BICYCLE TIRES.

(Application tlled Oct` 2, 1897.)

(No Model.)

7a3' Horner/s.

UNITED STATES PATENT TEETCE.

.THOMAS HARRISON, or WHITLEY, ENGLAND.

yvAL'via FOR BICYCLE-TIRES.

SPECIFICATION forining part of vLetters Patent No. 629,561, dated-July 25, 1899.

Application lecl October 2,1897. Serial No. 653,837. (No model.)

To all whom it may concern:

, Be it known that I, THOMAS HAaEisoN,'a subject of the Queen of Great Britain and Ireland,residing at Countess avenue,Vhitley',in

the county of Northumberland,England,have

invented certain new and useful Improvements inValves for Pneumatic Tires and other Purposes, (for part of which invention I have obtained a patent in Great Britain, No. 5,605,

1o dated March 3, 1897 of which the following is a specification.

My invention relates to Valves for pneumatic tires, and has for its object to provide a Valve more reliable and efficient for the purpose than those hitherto in use and by which leakage is prevented and the infiation and deflation of the tire more easily and readily accomplished. To this end and according to my invention I arrange within the 2.o valve-casing two stop-valves and one nonreturn Valve, the former controlling the inl ner passage to the air-tube and an outer passage to the atmosphere, the non-return valve controlling the air-admission from the inflator and arranged in some cases between the innerstop-valve and air-tube. The stop-valves and in some cases the non-return valve are 4o A, forming an intervening annular space 4 5 from the air-tube by the passage P. At its outer` end the inner tube T has another stop-Valvev a', the said tube T having at its inner end a stop-Valve V, seated in an appropriatelyformed part .of the casing, or a Washer, as at V', and controlling the admission of air to and S seated over the screwed joint i0 between the part T and the nut or cap N, which screwed part is formed of such fit as to freely pass air 5 o for deflation. The stop-valve S may be formed by suitably reducing the tube T, as shown, its

seat being formed by apwaslier of vulcanized fiber or suitable material, such as W, or a specially-formed part of the casing, or the eX- ternal nut or cap N, screwing upon the outer casing and yupon theinner tube T,as described. The washer W also, serves to make a tight joint between the outer casing and nut or cap 4 N. The said tube T passes outward, as at f, and is screwed or otherwise formed for reception of the inflator and carries a fixed adj usting nut or cap, such as N. Within the inner tube is arranged a non-return valve R, of 1 ebonite, brass, steel, or other suitable material, with spring fr', as in Fig. l, or in the form of a ball-valve, as at R', Fig. .3. This valve has its seat at the reduced part t0 of the tube T'and is adapted to -pass air into the inner tube by the passage P on operation of the iniiator, for the use of which the adj Listing-nut N is operated to unscrew the part t sufficient to shut the outer stop-Valve S and open the inner stop-valve V, as shown in Fig. 1. From the inner tube T the air passes by apertures l) in the walls thereof to the space a past the inner stop-valve V to the air-tube, its return being prevented by the non-return valve R and the outer stop-valve S.

In Fig. 3 is shown the inner tube T, with a I non-return valve of thc ball type having its seat over the air-admission passage P and kept in position for action by a projecting spindle or part of the valve-casing O, preferably of less diameter than the ball and adapted to come about its inner central part, allowing it to rise only a short distance from its seat, so that by reason of the entering air under pressure on inliation the ball rotates or vibrates between its seat and the projecting spindle C and will always find its seat on the external pressure in whatever -position the valve may be at the time.

When the tire is inflated, the external nut N is operated to screw the part tup tight, shutting the inner stop-valve V and effectually securing the air within the tire. A

similar result is obtained when the nut N is screwed tightly down, asin Fig. 1, closing the outer and opening the inner stop-valve, the non-return valve R being held tightly upon its seat by its spring fr or t-he air-pressure,

IOO

back stroke of the inflator or withdrawal of thus providing an alternative or an additional means for preventing leakage of air from the tire.

When it is desired to defiate the tire, the adj usting-nut N is half unscrewed, as shown in Fig. '2, when both the inner and outerstopvalves being half open the air can escape.

In order that the valves may be more readily operated and in a more or less automatic manner, I' have devised the arrangements shown in Fig. 3, in which the 'extended part t of the inner tube T is shown provided with reversely-screwed parts s s' and a fixed part s3 at the junction of the reversely-screwed parts, so that on screwing on the inilator-noz zle (shown dotted at fi) the latter will engage the part s3 and further movement will un- Hated. After inflation on unscrewiug the noz.

zle 1l the latter being tightly pressed against the part s3 carries it with it and therefore at the same time screws up the tube T until the valve Vcomes upon its seat. Continued movement disengages the nozzle rfrom the part S8, and the nozzle is unscrewed and removed. The outer part of s3 is screwed with a thread of the same kind as that upon the part t, so that the screwing of the dust-cap (shown at X, Fig. 3) thereon, if at all, assists to shut and keep the valve V tight, and the valve may be opened or operated for use of the inflator by unscrewing the dust-cap; but should this 'fail to act the screwing on of the iniiator-nozzle will complete the operation.

Having now described myinvention, what I claim, and desire to secure by Letters Patent, is-

1. The improvement in valves for pneumatic tires and the like, comprising the combination of an inner tube or valve-carrying part and an inclosing casing with a space between same and the inner tube, a non-return valve seated over an air-admission passage and arranged Within the inner tube or part, the latter having apertures in its Walls and a stopvalve carried at either end of said tube adapted to be seated over a passage to the air-chamber and a passage for deflation, all arranged and adapted for operation substantially in the manner and for the purposes set forth.

2. The improvements in valves for pneumat-ic tires and other purposes comprising an outer casing an inner tube Within and of less diameter thanthe interior of said outer casing and having apertures in its walls and carL rying a stop-valve at either end, a nonreturn valve arranged in the inner tube and having a centrally-disposed guide or spindle at its back, suitable air-passages being provided and the stop-valves arranged for deflation, substantially in the manner set forth.

3. A valve for pneumatic tires and other purposes comprising an outer casing, an in- -ternal valve-carrying part having apertures in its walls communicating with the inflationnozzle, a cap and Washer for securing the valve-carrying part in position and providing an air-tight joint with the outer valve on the latter during inflation and also with the outer casing, and an external nut for operating the valve or valves substantially as set forth.

In witness whereof I have hereunto set my hand in presence of two' witnesses.

THOMAS HARRISON. Witnessesp HENRY A. Paroli., J. A. HARVEY. 

